如何解决这个问题 ？

leeshasr

uname -a
Linux debian 2.6.32-3-686 #1 SMP Thu Feb 25 06:14:20 UTC 2010 i686 GNU/Linux

lee@debian:~$ java TestPgsql
org.postgresql.util.PSQLException: 尝试连线已失败。
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:150)
        at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
        at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
        at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
        at org.postgresql.jdbc3.Jdbc3Connection.<init>(Jdbc3Connection.java:24)
        at org.postgresql.Driver.makeConnection(Driver.java:393)
        at org.postgresql.Driver.connect(Driver.java:267)
        at java.sql.DriverManager.getConnection(DriverManager.java:582)
        at java.sql.DriverManager.getConnection(DriverManager.java:207)
        at TestPgsql.main(TestPgsql.java:15)
Caused by: java.net.SocketException: Network is unreachable
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:525)
        at java.net.Socket.connect(Socket.java:475)
        at java.net.Socket.<init>(Socket.java:372)
        at java.net.Socket.<init>(Socket.java:186)
        at org.postgresql.core.PGStream.<init>(PGStream.java:62)
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:76)
        ... 9 more

leeshasr

没有人遇到吗？
谢谢！